基于声电联合检测技术的高压开关柜局部放电缺陷分析及整改措施研究

Partial Discharge Defect Analysis of High － voltage Switchgear Based on Detection Technology Combined Ultrasonic and Electrical and Ｒesearch on Its Improvement Measures

摘要:

利用带电检测技术可有效发现开关柜中的绝缘类缺陷，准确掌握开关柜运行状态。针对一起典型的 10kV 开 关柜内部局部放电的案例，采用暂态地电压( TEV) 检测技术、超声波( AE) 检测技术及超高频( UHF) 检测技术对开关 柜进行检测，发现存在局放信号，通过信号分析和停电检查找出局部放电的原因并提出了相应的整改措施。得出的 结论对开关柜的局部放电带电检测诊断和整改措施提供了可靠的指导。

Abstract:

The insulation defects can be found out and the operation state can be known accurately by using on － line detection technology． A typical case of partial discharge in 10 kV switchgear is described． By using transient earth voltage ( TEV) detection technology，acoustic emission ( AE) detection technology，and ultra － high frequency ( UHF) detection technology， the partial discharge signal in switchgear is detected． Through signal analysis and outage detection，the main reasons are found out and the improvement measures are put forward． The obtained results can provide a reliable guidance for the detection and improvement measures of partial discharge in switchgear．